CN105449269A - Lithium ion battery - Google Patents
Lithium ion battery Download PDFInfo
- Publication number
- CN105449269A CN105449269A CN201610015479.5A CN201610015479A CN105449269A CN 105449269 A CN105449269 A CN 105449269A CN 201610015479 A CN201610015479 A CN 201610015479A CN 105449269 A CN105449269 A CN 105449269A
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- ion battery
- lithium
- agent
- negative electrode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 title claims abstract description 34
- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 40
- 239000006258 conductive agent Substances 0.000 claims abstract description 25
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 239000002041 carbon nanotube Substances 0.000 claims abstract description 13
- 229910021393 carbon nanotube Inorganic materials 0.000 claims abstract description 12
- 239000003792 electrolyte Substances 0.000 claims abstract description 10
- 229910052744 lithium Inorganic materials 0.000 claims description 26
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 claims description 23
- 239000003795 chemical substances by application Substances 0.000 claims description 20
- 238000004513 sizing Methods 0.000 claims description 20
- 229910052493 LiFePO4 Inorganic materials 0.000 claims description 19
- AWKHTBXFNVGFRX-UHFFFAOYSA-K iron(2+);manganese(2+);phosphate Chemical compound [Mn+2].[Fe+2].[O-]P([O-])([O-])=O AWKHTBXFNVGFRX-UHFFFAOYSA-K 0.000 claims description 18
- 230000004888 barrier function Effects 0.000 claims description 13
- -1 polytetrafluoroethylene Polymers 0.000 claims description 12
- 239000011230 binding agent Substances 0.000 claims description 9
- 239000002270 dispersing agent Substances 0.000 claims description 9
- 239000011883 electrode binding agent Substances 0.000 claims description 9
- 239000007773 negative electrode material Substances 0.000 claims description 9
- 239000007774 positive electrode material Substances 0.000 claims description 9
- 239000002033 PVDF binder Substances 0.000 claims description 7
- 229920002981 polyvinylidene fluoride Polymers 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 6
- 229920002134 Carboxymethyl cellulose Polymers 0.000 claims description 3
- 229910013716 LiNi Inorganic materials 0.000 claims description 3
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 3
- HMDDXIMCDZRSNE-UHFFFAOYSA-N [C].[Si] Chemical compound [C].[Si] HMDDXIMCDZRSNE-UHFFFAOYSA-N 0.000 claims description 3
- 239000006230 acetylene black Substances 0.000 claims description 3
- 229910052799 carbon Inorganic materials 0.000 claims description 3
- 239000001768 carboxy methyl cellulose Substances 0.000 claims description 3
- 235000010948 carboxy methyl cellulose Nutrition 0.000 claims description 3
- 239000008112 carboxymethyl-cellulose Substances 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 3
- 239000005955 Ferric phosphate Substances 0.000 abstract description 5
- 229940032958 ferric phosphate Drugs 0.000 abstract description 5
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 abstract description 5
- 229910000399 iron(III) phosphate Inorganic materials 0.000 abstract description 5
- GELKBWJHTRAYNV-UHFFFAOYSA-K lithium iron phosphate Chemical compound [Li+].[Fe+2].[O-]P([O-])([O-])=O GELKBWJHTRAYNV-UHFFFAOYSA-K 0.000 abstract description 4
- KLARSDUHONHPRF-UHFFFAOYSA-N [Li].[Mn] Chemical compound [Li].[Mn] KLARSDUHONHPRF-UHFFFAOYSA-N 0.000 abstract 2
- 239000006257 cathode slurry Substances 0.000 abstract 2
- 229910013421 LiNixCoyMn1-x-yO2 Inorganic materials 0.000 abstract 1
- 229910013427 LiNixCoyMn1−x−yO2 Inorganic materials 0.000 abstract 1
- 239000006182 cathode active material Substances 0.000 abstract 1
- 239000012528 membrane Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 description 13
- 239000002131 composite material Substances 0.000 description 10
- 239000004698 Polyethylene Substances 0.000 description 7
- DVATZODUVBMYHN-UHFFFAOYSA-K lithium;iron(2+);manganese(2+);phosphate Chemical compound [Li+].[Mn+2].[Fe+2].[O-]P([O-])([O-])=O DVATZODUVBMYHN-UHFFFAOYSA-K 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 5
- 229920000573 polyethylene Polymers 0.000 description 5
- 230000008901 benefit Effects 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 4
- 239000007772 electrode material Substances 0.000 description 4
- 239000006245 Carbon black Super-P Substances 0.000 description 3
- 229910012748 LiNi0.5Mn0.3Co0.2O2 Inorganic materials 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 3
- 238000001467 acupuncture Methods 0.000 description 3
- 239000007767 bonding agent Substances 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 230000014759 maintenance of location Effects 0.000 description 3
- OIFBSDVPJOWBCH-UHFFFAOYSA-N Diethyl carbonate Chemical compound CCOC(=O)OCC OIFBSDVPJOWBCH-UHFFFAOYSA-N 0.000 description 2
- KMTRUDSVKNLOMY-UHFFFAOYSA-N Ethylene carbonate Chemical compound O=C1OCCO1 KMTRUDSVKNLOMY-UHFFFAOYSA-N 0.000 description 2
- QSNQXZYQEIKDPU-UHFFFAOYSA-N [Li].[Fe] Chemical compound [Li].[Fe] QSNQXZYQEIKDPU-UHFFFAOYSA-N 0.000 description 2
- 230000003139 buffering effect Effects 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- IEJIGPNLZYLLBP-UHFFFAOYSA-N dimethyl carbonate Chemical compound COC(=O)OC IEJIGPNLZYLLBP-UHFFFAOYSA-N 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 150000002484 inorganic compounds Chemical class 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 238000011076 safety test Methods 0.000 description 2
- 229910015015 LiAsF 6 Inorganic materials 0.000 description 1
- 229910013684 LiClO 4 Inorganic materials 0.000 description 1
- 229910010707 LiFePO 4 Inorganic materials 0.000 description 1
- 229910013870 LiPF 6 Inorganic materials 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000000875 corresponding effect Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006386 memory function Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000010450 olivine Substances 0.000 description 1
- 229910052609 olivine Inorganic materials 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 239000011236 particulate material Substances 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
- H01M4/364—Composites as mixtures
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention is applicable to the field of lithium ion batteries, and provides a lithium ion battery comprising a cathode plate, an anode plate, a membrane and electrolyte, wherein the surface of the cathode plate is coated with cathode slurry including cathode active materials including lithium iron phosphate, ternary material and lithium manganese ferric phosphate; the ternary material is represented by the formula of LiNixCOyMn1-x-yO2, wherein x is less than 1 and more than 0, y is less than 1 and more than 0, and the sum of x and y is less than 1 and more than 0. The mass ratio of the lithium iron phosphate, ternary material and lithium manganese ferric phosphate is (10-60):(10-50):(10-50). The cathode slurry also includes conductive agents which are carbon nanotubes. The lithium ion battery provided by the invention is significantly improved in cycle performance, energy density and safety performance.
Description
Technical field
The invention belongs to field of lithium ion battery, be specifically related to a kind of lithium ion battery.
Background technology
Along with the continuous consumption of the conventional fossil fuel energy is with increasingly exhausted, countries in the world are all doing one's utmost to find new alternative energy source, advantages such as lithium ion battery has extended cycle life because having, energy density is high, memory-less effect, environmental protection and become study hotspot.In recent years, along with countries in the world are to the promotion of New Energy Industry and support, new-energy automobile has welcome fast-developing period, and lithium ion battery becomes the important energy source supply of new forms of energy battery.
At present, the lithium ion battery being applied to new-energy automobile field mainly contains ferric phosphate lithium cell, ternary battery and iron manganese phosphate lithium battery.LiFePO4 is olivine structural, and electrode material Stability Analysis of Structures in charge and discharge process, has excellent cycle performance and security performance.But, LiFePO4 tap density and compacted density lower, discharge voltage plateau low (being about 3.2V), make ferric phosphate lithium cell energy density lower, current cylinder 32650 type ferric phosphate lithium cell highest energy density is about 120Wh/Kg, and this is difficult to meet the new-energy automobile requirement more and more harsh to course continuation mileage.The advantage of ternary battery applications on new-energy automobile is energy density high (>=150Wh/Kg), but its security performance is poor, is difficult to by lancing test, needs fairly perfect battery management system to control.The advantage of iron manganese phosphate lithium battery is that fail safe is good, operating voltage is high, but the high rate performance of iron manganese phosphate for lithium and cycle performance poor.Therefore, a kind of lithium ion battery simultaneously with high safety performance, long circulating performance and high-energy-density is still lacked in this area.
Summary of the invention
Technical problem to be solved by this invention is to improve the security performance of lithium ion battery, cycle performance and energy density simultaneously, is intended to meet the requirement of new-energy automobile to cycle performance of lithium ion battery, security performance and energy density.
For solving the problems of the technologies described above, the invention provides a kind of lithium ion battery, comprise a positive plate, a negative plate, a barrier film and electrolyte, described positive plate surface-coated has anode sizing agent, described anode sizing agent comprises positive active material, and described positive active material comprises LiFePO4, ternary material and iron manganese phosphate for lithium; The general formula of described ternary material is LiNi
xco
ymn
1-x-yo
2, wherein 0<x<1,0<y<1,0<x+y<1.
Further, the mass ratio of described LiFePO4, ternary material and iron manganese phosphate for lithium is: 10 ~ 60:10 ~ 50:10 ~ 50.
Further, described anode sizing agent also comprises conductive agent, and described conductive agent is carbon nano-tube.
Further, described carbon nano-tube accounts for the mass percent of anode sizing agent is 1% ~ 5%.
Further, described anode sizing agent also comprises binding agent, and described binding agent is polyvinylidene fluoride or polytetrafluoroethylene.
Further, described binding agent accounts for the mass percent of anode sizing agent is 1% ~ 5%.
Further, described negative plate surface-coated has cathode size, and described cathode size comprises negative electrode active material, cathode conductive agent, negative pole dispersant and negative electrode binder; The mass ratio of described negative electrode active material, cathode conductive agent, negative pole dispersant and negative electrode binder is: 85-95:2-5:1-3:2-5.
Further, described negative electrode active material is at least one in graphitic carbon, Graphene, silicon-carbon and Delanium.
Further, described negative pole dispersant is carboxymethyl cellulose.
Further, described cathode conductive agent is acetylene black; Described negative electrode binder is at least one in polyvinyl alcohol and polytetrafluoroethylene.
The present invention compared with prior art, beneficial effect is: the positive active material in the anode sizing agent of lithium ion battery of the present invention adopts the compound of LiFePO4, ternary material and iron manganese phosphate for lithium three kinds of materials, make full use of the high security of LiFePO4, the high-energy-density of ternary material and the high voltage platform of iron manganese phosphate for lithium, the deficiency existed when three kinds of materials utilize separately can be overcome simultaneously, significantly improve cycle performance and the energy density of battery.During described three-phase composite; short grained iron lithium material can be wrapped in ternary material particle surface; the ternary material particle that particle diameter is relatively little also can be filled in the hollow structure of iron manganese phosphate for lithium; when battery be short-circuited, the safety test such as acupuncture time; first short dot acts on on iron manganese phosphate for lithium and lithium iron phosphate particles; the high security of LiFePO4 and iron manganese phosphate for lithium can be made full use of; short-circuit resistance is larger; buffering and abated effect are played to short circuit current, thus the effect playing safeguard protection significantly improves the security performance of lithium ion battery.The lithium ion battery prepared by the present invention achieves the requirement of industry development to the cycle performance of battery, energy density and security performance.
Accompanying drawing explanation
Fig. 1 is the cyclic curve figure of three kinds of batteries when 2.75V-4.2V, 3C that the embodiment of the present invention 1,2,3 provides.
Fig. 2 be three kinds of batteries providing of the embodiment of the present invention 1,2,3 at 1C, the discharge curve at-20 DEG C.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Lithium ion battery is prepared according to technical scheme of the present invention:
A kind of lithium ion battery, comprise a positive plate, a negative plate, a barrier film and electrolyte, described positive plate surface-coated has anode sizing agent, and described anode sizing agent comprises positive active material, and described positive active material comprises LiFePO4, ternary material and iron manganese phosphate for lithium; The general formula of described ternary material is LiNi
xco
ymn
1-x-yo
2, wherein 0<x<1,0<y<1,0<x+y<1.The mass ratio of described LiFePO4, ternary material and iron manganese phosphate for lithium is: 10 ~ 60:10 ~ 50:10 ~ 50.
Particularly, described anode sizing agent also comprises conductive agent, and described conductive agent is carbon nano-tube; The mass percent that described carbon nano-tube accounts for anode sizing agent is 1% ~ 5%.Described anode sizing agent also comprises binding agent, and described binding agent is polyvinylidene fluoride or polytetrafluoroethylene; The mass percent that described binding agent accounts for anode sizing agent is 1% ~ 5%.
Particularly, described negative plate surface-coated has cathode size, and described cathode size comprises negative electrode active material, cathode conductive agent, negative pole dispersant and negative electrode binder; The mass ratio of described negative electrode active material, cathode conductive agent, negative pole dispersant and negative electrode binder is: 85-95:2-5:1-3:2-5.
Particularly, described negative electrode active material is at least one in graphitic carbon, Graphene, silicon-carbon and Delanium.Described negative pole dispersant is carboxymethyl cellulose.Described cathode conductive agent is acetylene black; Described negative electrode binder is at least one in polyvinyl alcohol and polytetrafluoroethylene.
Particularly, described barrier film be PP (polypropylene) and/or PE (polyethylene), at PP and/or PE surface-coated inorganic compound or organic compound, polyethylene double-surface ceramics barrier film; Described inorganic compound comprises Al
2o
3, SiO
2, described organic substance is PVDF (Kynoar).
Particularly, described electrolyte comprises electrolyte and organic solvent; Described electrolyte comprises LiPF
6, LiClO
4, LiAsF
6in at least one, described solvent comprises at least one in EC (ethylene carbonate), DMC (dimethyl carbonate), DEC (diethyl carbonate).
Lithium ion battery prepared by the present invention, mainly adjusts positive active material.Iron manganese phosphate for lithium voltage platform is 3.9-4.1V, and ternary material voltage platform is 3.4-3.6V, and LiFePO4 voltage platform is 3.1-3.2V.In 2.5-4.2V charging/discharging voltage interval, wherein, discharge and recharge reaction within the scope of 2.5-3.4V is born primarily of LiFePO 4 material and is carried out, discharge and recharge reaction within the scope of 3.4-3.9V is born primarily of ternary material and is carried out, and the discharge and recharge reaction in 3.9-4.2V voltage range is born primarily of iron manganese phosphate lithium material and carried out.Therefore compared to single_phase system and two-phase composites, the three-phase system of the present invention voltage that each material bears within the scope of the voltage range of setting is narrower, and therefore the energy density of three-phase system battery gets a promotion, and cycle performance also increases simultaneously.
Ternary material particle is that class is spherical, and particle is comparatively large, and meso-position radius is 10-15 μm of (meso-position radius D
50represent, particle diameter corresponding when referring to that the cumulative particle sizes percentile of a sample reaches 50%); LiFePO4 is small-particulate materials, and meso-position radius is 1-2 μm; Iron manganese phosphate for lithium is hollow sphere structure, and particle is large, and meso-position radius is 25-30 μm.During three-phase composite; short grained iron lithium material can be wrapped in ternary material particle surface; the ternary material particle that particle diameter is relatively little also can be filled in the hollow structure of iron manganese phosphate for lithium; when battery be short-circuited, the safety test such as acupuncture time; first short dot acts on on iron manganese phosphate for lithium and lithium iron phosphate particles, and can make full use of the high security of LiFePO4 and iron manganese phosphate for lithium, short-circuit resistance is larger; buffering and abated effect are played to short circuit current, thus plays the effect of safeguard protection.Therefore the security performance of the lithium ion battery of three-phase system of the present invention improves.
Anode sizing agent in positive plate of the present invention adopts carbon nano-tube as conductive agent, and improving can the conductivity of electrode material and cryogenic property, and carbon nano-tube has certain electrolyte memory function simultaneously, can the cycle performance of lift three-phase compound system further.
The present invention is in prepared lithium ion battery, and the component of barrier film and electrolyte also can affect the correlated performance of prepared lithium ion battery to a certain extent to some extent.Therefore the present invention preferably uses described barrier film and electrolyte.
Embodiment 1
Battery size used is 32650, and capacity is 5.6Ah, and energy density is 135Wh/Kg.Positive pole adopts ternary material (LiNi
0.5mn
0.3co
0.2o
2) and iron manganese phosphate lithium material press the mass ratio mixing of 50:50, conductive agent adopts Super-P (conductive black) and KS-6 (electrically conductive graphite), and bonding agent is polyvinylidene fluoride.Negative pole uses Delanium, and barrier film adopts polyethylene double-surface ceramics barrier film (12+2+2), assemble battery and be numbered A.
Embodiment 2
The battery size that the present embodiment adopts is 32650, and capacity is 5.7Ah, and energy density is 135Wh/Kg.Positive pole adopts LiFePO4, ternary material (LiNi
0.5mn
0.3co
0.2o
2) and iron manganese phosphate lithium material press 40:27:33 mass ratio mixing, conductive agent adopt Super-P and KS-6, bonding agent is polyvinylidene fluoride.Negative pole uses Delanium, and barrier film adopts polyethylene double-surface ceramics barrier film (12+2+2), assemble battery and be numbered B.
Embodiment 3
The battery size that the present embodiment adopts is 32650, and capacity is 5.7Ah, and energy density is 135Wh/Kg.Positive pole adopts LiFePO4, ternary material (LiNi
0.5mn
0.3co
0.2o
2) and iron manganese phosphate lithium material mix in the ratio of 40:27:33, conductive agent adopt carbon nano-tube CNTs, bonding agent is polyvinylidene fluoride.Negative pole uses Delanium, and barrier film adopts polyethylene double-surface ceramics barrier film (12+2+2), assemble battery and be numbered C.
(3C circulation refers to that battery carries out charge-discharge test with 3 of its rated capacity times of electric currents to test battery A, B, C 3C cycle performance under 2.75V-4.2V, such as battery rated capacity is 5Ah, size of current when then carrying out 3C circulation time constant current charge set by us and constant-current discharge is exactly 15A), result is as shown in Figure 1.As can be seen from Fig. 1, two-phase composites (ternary material+iron manganese phosphate for lithium, battery A) the 3C 300 weeks capability retentions that circulate are 92.12%.Adopt three-phase composite system (LiFePO4+ternary material+iron manganese phosphate for lithium, battery B) 3C cycle performance to be better than two-phase composites, within 300 weeks, capability retention reaches 96.49%.Adopt carbon nano-tube as after conductive agent (battery C) on this basis again, the conductivity of electrode material is improved, and cycle performance also promotes to some extent, and 3C, 300 weeks capability retentions reach 98.51%.
Test battery A, B, C are at 1C, and the discharge performance at-20 DEG C, result as shown in Figure 2.As can be seen from Fig. 2, two-phase composites (ternary material+iron manganese phosphate for lithium, battery A) and three-phase composite system (LiFePO4+ternary material+iron manganese phosphate for lithium, battery B) cryogenic property poor, battery A and B-20 DEG C, discharge capacity under 1C be about its 25 DEG C, 1C discharge capacity 60.1% and 64.5%.Adopt after carbon nano-tube does conductive agent, the conductivity of electrode material gets a promotion, and the cryogenic property of battery improves, battery C-20 DEG C, discharge capacity under 1C be about its 25 DEG C, 1C discharge capacity 74.35%.
The security performance of test battery A, B, C, result is as shown in table 1.
Table 1 assemble the security performance table with test results of battery
| Battery | Initial voltage (V) | Overcharge experiment percent of pass | Short circuit experiment percent of pass | Acupuncture experiment percent of pass |
| A | 4.2 | 8/10 | 9/10 | 0/10 |
| B | 4.2 | 10/10 | 10/10 | 10/10 |
| C | 4.2 | 10/10 | 10/10 | 10/10 |
As can be seen from above-mentioned Fig. 1, Fig. 2 and table 1, positive active material adopts LiFePO4 to have than ternary material and the better cycle performance of composite the assembled battery of iron manganese phosphate for lithium two-phase and security performance with ternary material and composite the assembled battery of iron manganese phosphate for lithium three-phase; Adopt carbon nano-tube as conductive agent than adopting Super-P and KS-6 as the better cycle performance of conductive agent and low temperature performance.Illustrate and obtain according to technical scheme of the present invention cycle performance and the cryogenic property that lithium ion battery also improves battery while improving security performance.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a lithium ion battery, comprise a positive plate, a negative plate, a barrier film and electrolyte, described positive plate surface-coated has anode sizing agent, it is characterized in that, described anode sizing agent comprises positive active material, and described positive active material comprises LiFePO4, ternary material and iron manganese phosphate for lithium; The general formula of described ternary material is LiNi
xco
ymn
1-x-yo
2, wherein 0<x<1,0<y<1,0<x+y<1.
2. lithium ion battery as claimed in claim 1, it is characterized in that, the mass ratio of described LiFePO4, ternary material and iron manganese phosphate for lithium is: 10 ~ 60:10 ~ 50:10 ~ 50.
3. lithium ion battery as claimed in claim 1, it is characterized in that, described anode sizing agent also comprises conductive agent, and described conductive agent is carbon nano-tube.
4. lithium ion battery as claimed in claim 3, it is characterized in that, the mass percent that described conductive agent accounts for anode sizing agent is 1% ~ 5%.
5. lithium ion battery as claimed in claim 1, it is characterized in that, described anode sizing agent also comprises binding agent, and described binding agent is polyvinylidene fluoride or polytetrafluoroethylene.
6. lithium ion battery as claimed in claim 5, it is characterized in that, the mass percent that described binding agent accounts for anode sizing agent is 1% ~ 5%.
7. lithium ion battery as claimed in claim 1, it is characterized in that, described negative plate surface-coated has cathode size, and described cathode size comprises negative electrode active material, cathode conductive agent, negative pole dispersant and negative electrode binder; The mass ratio of described negative electrode active material, cathode conductive agent, negative pole dispersant and negative electrode binder is: 85-95:2-5:1-3:2-5.
8. lithium ion battery as claimed in claim 7, it is characterized in that, described negative electrode active material is at least one in graphitic carbon, Graphene, silicon-carbon and Delanium.
9. lithium ion battery as claimed in claim 7, it is characterized in that, described negative pole dispersant is carboxymethyl cellulose.
10. lithium ion battery as claimed in claim 7, it is characterized in that, described cathode conductive agent is acetylene black; Described negative electrode binder is at least one in polyvinyl alcohol and polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610015479.5A CN105449269B (en) | 2016-01-08 | 2016-01-08 | A kind of lithium ion battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610015479.5A CN105449269B (en) | 2016-01-08 | 2016-01-08 | A kind of lithium ion battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105449269A true CN105449269A (en) | 2016-03-30 |
| CN105449269B CN105449269B (en) | 2018-07-24 |
Family
ID=55559222
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610015479.5A Expired - Fee Related CN105449269B (en) | 2016-01-08 | 2016-01-08 | A kind of lithium ion battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105449269B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428121A (en) * | 2017-08-21 | 2019-03-05 | 江苏津谊新能源科技有限公司 | A kind of manufacturing method of high-energy-density lithium-ion-power cell |
| CN113039669A (en) * | 2018-12-05 | 2021-06-25 | 东丽株式会社 | Positive electrode for lithium ion secondary battery, electrode paste for lithium ion secondary battery, and lithium ion secondary battery |
| CN114079046A (en) * | 2020-08-14 | 2022-02-22 | 比亚迪股份有限公司 | Mixed positive electrode material, positive electrode plate, manufacturing method of positive electrode plate and battery |
| CN114447430A (en) * | 2020-10-30 | 2022-05-06 | 深圳新宙邦科技股份有限公司 | Lithium ion battery |
| CN114447327A (en) * | 2020-10-30 | 2022-05-06 | 深圳新宙邦科技股份有限公司 | Lithium ion battery anode and lithium ion battery |
| WO2022199681A1 (en) * | 2021-03-25 | 2022-09-29 | 比亚迪股份有限公司 | Lithium-ion battery and motorized vehicle |
| CN116259846A (en) * | 2023-04-11 | 2023-06-13 | 湖北亿纬动力有限公司 | Lithium ion battery electrolyte and lithium ion battery |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102117913A (en) * | 2009-12-31 | 2011-07-06 | 珠海光宇电池有限公司 | Power battery using mixed anode material |
| CN103066280A (en) * | 2012-12-28 | 2013-04-24 | 珠海泰坦能源电子技术有限公司 | Spherical lithium iron phosphate anode material and preparation method thereof |
| US20140138591A1 (en) * | 2011-07-25 | 2014-05-22 | A123 Systems, Inc. | Blended cathode materials |
| CN104300123A (en) * | 2014-03-20 | 2015-01-21 | 中航锂电（洛阳）有限公司 | Mixed positive electrode material, positive plate using the same, and lithium ion battery |
| CN104347846A (en) * | 2013-07-26 | 2015-02-11 | 浙江南博电源科技有限公司 | Preparation method for safety-improved nickel-cobalt lithium manganate positive electrode sheet |
| CN104577118A (en) * | 2015-01-04 | 2015-04-29 | 合肥国轩高科动力能源股份公司 | Preparation method of novel core-shell structure modified cathode material |
-
2016
- 2016-01-08 CN CN201610015479.5A patent/CN105449269B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102117913A (en) * | 2009-12-31 | 2011-07-06 | 珠海光宇电池有限公司 | Power battery using mixed anode material |
| US20140138591A1 (en) * | 2011-07-25 | 2014-05-22 | A123 Systems, Inc. | Blended cathode materials |
| CN103066280A (en) * | 2012-12-28 | 2013-04-24 | 珠海泰坦能源电子技术有限公司 | Spherical lithium iron phosphate anode material and preparation method thereof |
| CN104347846A (en) * | 2013-07-26 | 2015-02-11 | 浙江南博电源科技有限公司 | Preparation method for safety-improved nickel-cobalt lithium manganate positive electrode sheet |
| CN104300123A (en) * | 2014-03-20 | 2015-01-21 | 中航锂电（洛阳）有限公司 | Mixed positive electrode material, positive plate using the same, and lithium ion battery |
| CN104577118A (en) * | 2015-01-04 | 2015-04-29 | 合肥国轩高科动力能源股份公司 | Preparation method of novel core-shell structure modified cathode material |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109428121A (en) * | 2017-08-21 | 2019-03-05 | 江苏津谊新能源科技有限公司 | A kind of manufacturing method of high-energy-density lithium-ion-power cell |
| CN113039669A (en) * | 2018-12-05 | 2021-06-25 | 东丽株式会社 | Positive electrode for lithium ion secondary battery, electrode paste for lithium ion secondary battery, and lithium ion secondary battery |
| JPWO2020116160A1 (en) * | 2018-12-05 | 2021-10-14 | 東レ株式会社 | Positive electrode for lithium ion secondary battery, electrode paste for lithium ion secondary battery, lithium ion secondary battery |
| JP7259766B2 (en) | 2018-12-05 | 2023-04-18 | 東レ株式会社 | Positive electrode for lithium ion secondary battery, electrode paste for lithium ion secondary battery, lithium ion secondary battery |
| CN114079046A (en) * | 2020-08-14 | 2022-02-22 | 比亚迪股份有限公司 | Mixed positive electrode material, positive electrode plate, manufacturing method of positive electrode plate and battery |
| CN114079046B (en) * | 2020-08-14 | 2024-01-09 | 比亚迪股份有限公司 | Mixed positive electrode material, positive electrode plate, manufacturing method of positive electrode plate and battery |
| CN114447430A (en) * | 2020-10-30 | 2022-05-06 | 深圳新宙邦科技股份有限公司 | Lithium ion battery |
| CN114447327A (en) * | 2020-10-30 | 2022-05-06 | 深圳新宙邦科技股份有限公司 | Lithium ion battery anode and lithium ion battery |
| WO2022199681A1 (en) * | 2021-03-25 | 2022-09-29 | 比亚迪股份有限公司 | Lithium-ion battery and motorized vehicle |
| CN116259846A (en) * | 2023-04-11 | 2023-06-13 | 湖北亿纬动力有限公司 | Lithium ion battery electrolyte and lithium ion battery |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105449269B (en) | 2018-07-24 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110660965B (en) | Negative plate and preparation method thereof, lithium ion battery and preparation method and application thereof | |
| CN105552344B (en) | A kind of based lithium-ion battery positive plate, lithium ion battery and preparation method thereof | |
| CN105449269A (en) | Lithium ion battery | |
| JP6068655B2 (en) | Negative electrode active material for lithium secondary battery, lithium secondary battery containing the same, and method for producing negative electrode active material | |
| CN103165863A (en) | Positive pole piece and preparation method thereof and battery | |
| US9601777B2 (en) | Anode for lithium secondary battery, method for manufacturing same, and lithium secondary battery including same | |
| CN105914394B (en) | A kind of low-temperature lithium ion battery composite positive pole, low-temperature lithium ion battery anode pole piece and preparation method thereof, lithium ion battery | |
| CN103700820A (en) | Lithium ion selenium battery with long service life | |
| CN101197442A (en) | Lithium iron phosphate lithium ion battery | |
| CN101388449A (en) | Positive plate of high power lithium ionic cell and lithium ionic cell containing the same | |
| CN111799470B (en) | Positive pole piece and sodium ion battery | |
| CN105789553A (en) | Positive electrode of lithium ion battery | |
| CN101355165A (en) | Composite conductive agent for lithium ion battery anode material | |
| CN114284465A (en) | Preparation method of positive electrode slurry, positive electrode plate and lithium ion battery | |
| CN114335428B (en) | Positive plate, preparation method and battery | |
| CN115020678A (en) | Positive electrode active material, electrochemical device, and electronic device | |
| CN105761944A (en) | Composite positive plate for hybrid super capacitor and preparation method thereof, and hybrid super capacitor | |
| CN113224464A (en) | Lithium-sulfur battery taking CoS/NS co-doped graphene composite material coated diaphragm as intermediate layer | |
| CN110993901A (en) | Low-internal-resistance quick-charging and quick-discharging lithium ion power battery | |
| CN105990606B (en) | A kind of lithium ion battery | |
| Leonet et al. | Understanding of crucial factors for improving the energy density of lithium-sulfur pouch cells | |
| CN105513814B (en) | A kind of energy type capacitor batteries | |
| CN107785537A (en) | A kind of method of modifying of new type lithium ion battery anode pole piece, its purposes and pole piece | |
| CN105405669A (en) | Power type battery capacitor | |
| JP7223999B2 (en) | Positive electrode composition for lithium ion secondary battery, positive electrode for lithium ion secondary battery, and lithium ion secondary battery |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20180920 Granted publication date: 20180724 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20200320 Granted publication date: 20180724 |
|
| PP01 | Preservation of patent right | ||
| PP01 | Preservation of patent right |
Effective date of registration: 20200429 Granted publication date: 20180724 |
|
| PD01 | Discharge of preservation of patent | ||
| PD01 | Discharge of preservation of patent |
Date of cancellation: 20230331 Granted publication date: 20180724 |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180724 |